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Cold start issue - battery?

Old 01-21-2012, 04:15 PM
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2007 C230
Cold start issue - battery?

So my car has been standing outside in the freezing winter for about 3 days without being driven. Yesterday I had to move it on a side street because of a snow storm, did that no problem. Later that night I went back started it and it made the noise you see in the video below from the muffler for about two minutes and went back to normal, I haven't driven it. Today I came back started her up again, it did have trouble starting, possibly low battery. After being started it shut off a moment later and wouldn't start again.
Is it the battery or some other issue here?
http://www.youtube.com/watch?v=egKvFhbaZag

Last edited by chmura; 01-21-2012 at 04:22 PM.
Old 01-21-2012, 05:29 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Does it try to crank at all? Do the lights dim badly while cranking?

You could have a low battery. Cold can cause a battery to fail.

Check fuse 52 in the front SAM if there is zero crank. It's under value at 15 amps - replace with 20 amp. This is the most common failure

In fact check fuses 31, 52 & 57 while you are about it. All three are required to enable start but 52 usually blows.

If battery & fuses are OK you need to check CPS & temperature sensor. They are also interrogated to enable start.
Old 01-21-2012, 09:01 PM
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As always a detailed response by Glyn
I haven't got a chance to check on any fuses, but after getting a jump it's been starting smoothly ever since; just like summer time.
The cold must have got to it and I will probably need to replace the battery if I have a problem with this again, I'll see how it does after tonight.
Old 01-21-2012, 09:50 PM
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2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
Did you get any malfunction messages on your instrument cluster? Are there any error codes? Do you have access to a scanner like Innova 3140 that display live data

Put it in dyno mode so you can observe voltage
- key out
- key in
- navigate instrument cluster to milage display
- hit reset buttome 3 times

What is voltage before start? Lowest voltage when cranking? Idle voltage? Voltage when car is reving at about 1800 RPM?
Old 01-22-2012, 06:05 AM
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And have the battery load tested!

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